The England international, who featured four times for the semi-finalists in Russia, was left out entirely for the Blues' 3-2 win over Arsenal on Saturday evening.
"It depends on the position on the pitch," he told reporters. "I prefer to have on the bench two wingers, and only one midfielder. So it depends on this. Not any other situation.
"I needed on the bench one goalkeeper (Willy Caballero), one full-back (Davide Zappacosta), one centre-back (Andreas Christensen), maybe two midfielders and only one winger, but yesterday I preferred vice versa, two wingers (Eden Hazard, Victor Moses) and one midfielder (Kovacic)."
Speaking before this weekend's match, Loftus-Cheek vowed to fight for regular football at Stamford Bridge.